72356557289 has 2 divisors, whose sum is σ = 72356557290. Its totient is φ = 72356557288.

The previous prime is 72356557277. The next prime is 72356557307. The reversal of 72356557289 is 98275565327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64823706025 + 7532851264 = 254605^2 + 86792^2 .

It is an emirp because it is prime and its reverse (98275565327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72356557289 - 2³⁶ = 3637080553 is a prime.

It is not a weakly prime, because it can be changed into another prime (72356557589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36178278644 + 36178278645.

It is an arithmetic number, because the mean of its divisors is an integer number (36178278645).

Almost surely, 2^72356557289 is an apocalyptic number.

It is an amenable number.

72356557289 is a deficient number, since it is larger than the sum of its proper divisors (1).

72356557289 is an equidigital number, since it uses as much as digits as its factorization.

72356557289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752000, while the sum is 59.

The spelling of 72356557289 in words is "seventy-two billion, three hundred fifty-six million, five hundred fifty-seven thousand, two hundred eighty-nine".